The voice quality achieved by all the Gira home station versions can be compared to quality levels achieved in mobiles or hands-free systems in cars. The user selects his or her favourite from five different ringtone melodies as well as the optional light switching function – for staircases, for example – which can be implemented with an additional switching actuator. In addition to accepting calls and opening doors, other functions include switching the ringtone on and off, regulating the ringtone and voice volume, and switching up to three home stations in parallel.